I frequently hear my panniers clipping the spokes as I climb hills and accelerate hard. Tonight I was riding home from work and the rear corner of one bag caught the spokes of the rear wheel and fell off the rack. The problem is exacerbated with the more weight I put in the bags.
How do you folks make your panniers sturdier? Do better panniers prevent this? I may try replacing the flimsy plastic liner inside the bag with something stiffer.
I use Axiom Cartier bags and a crappy Trek Interchange rack.